Approximate Purchase Date: e.g.: in the next month
Budget Range: £2700
System Usage from Most to Least Important: Rendering, photoshop , video editing,hd video editing,Magix movie editor, videopad , audacity, photoshop, java applications. flash applications, stratugus game engine, code blocks, apache, Vmware osx, bluestacks. most likely at the same time.
Are you buying a monitor: No
Parts to Upgrade: New PC
Do you need to buy OS: No
Preferred Website(s) for Parts: amazon.co.uk
Parts Preferences: amd cpus only
SLI or Crossfire: Yes
Your Monitor Resolution:serveral 1920x1080
Additional Comments: several displays, some touchscreen
1) Your motherboard is not compatible with your case. You either need to find a case that will accept your motherboard or a motherboard that is compatible with your case.
2) As Manofchalk states, you're using gaming graphic cards in a workstation system. Remove them and replace with workstation class graphic cards. Not sure if you can SLI NVidia or Crossfire AMD workstation cards.
3) Dual processor system. You're going to want dual liquid cooling systems. That means a case that has two 120mm exhaust fans in the locale of the processors.
4) 64 GB of RAM... meh. As you said, overkill.
5) I'd definitely be looking into some sort of RAID array for storage. 3x3TB drives in a RAID5 array for ~6TB of storage would be my minimum.
1) That's research you can do on your own. Cases will identify what form factor motherboards they can accept (ATX, Micro-ATX, Extended-ATX, etc...)
2) Workstation class graphic cards like the NVidia Quadro or AMD FirePro are cards built specifically for work applications, not gaming. They use hardware and drivers specifically designed for work applications.
3) If you have a dual CPU system, why would you only liquid cool one processor? The liquid cooling solution you've chosen should exhaust heat from each CPU via a 120mm fan outlet. Two CPUs means two liquid cooling systems. Two liquid cooling systems means two 120mm fan outlets. You need to find a case that has two 120mm fan outlets (and accepts your motherboard form factor).
4) I'm saying probably too much, but you're the one saying, "overkill".
5) RAID is the Redundant Array of Independent Disks. Essentially, it's a safety feature using multiple hard drives to allow for data recovery in the event of a hard drive failure.